You can read Collective Shout's statement about this here, they state among other things that they pressured payment processors into complying with their demands by making over 1000 phonecalls to their companies. They previously also successfully stopped Tyler the Creator from touring in Australia, and also managed to have GTA V pulled from stores in Australia as well.
It's really dangerous that they're allowed to lobby for censorship like this, I hope this issue brings enough attention to the matter 🙏🏼